I'm coming to Hawaii for about a short 4 day trip this Labor Day weekend. Thru discounthawaiicarrental.com, I can get a mid-size car rental either thru Thrifty or Budget for $26/day. Since Budget is on-airport, airport fees cost $12-17 more than Thrifty. If my priority is to pick up my car quicker though, should I go with Budget? Can I just walk to Budget vs. shuttle to Thrifty. Also is there any chance of saving more $ by going bidding lower than these rental prices on priceline.com or hotwire.com? Thx.